Take control over your engine coolant temps by changing to an lower temp thermostat. These thermostats open at a lower temperature than your stock thermostat, getting your hot coolant to the radiator sooner. This is an important modification to make on any engine making more power than stock, from a cam only setup all the way into supercharged build. We offer both 160 and 180 degree options to fine tune your cooling system to your own needs.

Replaces GM part number 89018168 Replaces AC Delco part number 131-160

	LS1	LS2	LS3
Bolt Spacing	3 in	3 in	3-1/16 in
Water Pump Opening Diameter	2-1/16 in	1-7/8 in	1-15/16 in
Depth	1-5/8 in	1-11/16 in	1-15/16 in
Housing Opening Diameter	-	2-5/16 in	2-3/8 in